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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="box">box</div>
    <script>
      const box = document.getElementById("box");
      console.dir(box.__proto__ === HTMLDivElement.prototype);
      console.dir(HTMLDivElement.prototype.__proto__ === HTMLElement.prototype);
      console.dir(HTMLElement.prototype.__proto__ === Element.prototype);
      console.dir(Element.prototype.__proto__ === Node.prototype);
      console.dir(Node.prototype.__proto__ === EventTarget.prototype);
      console.dir(EventTarget.prototype.__proto__ === Object.prototype);
      console.dir(Object.prototype.__proto__ === null);
    </script>
  </body>
</html>
